CHICAGO — Four sisters from one family have each given birth within four days.

The same obstetrician delivered the babies of three of the sisters — 27-year-old Lilian Sepulveda, 29-year-old Saby Pazos and 24-year-old Leslie Pazos — in the same suburban Chicago hospital Friday and Saturday.

A fourth sister, Heidi Lopez, gave birth Monday in California.

Relatives say the women didn’t plan the timing.

Obstetrician Dr. Jean Alexandre, who delivered the three babies in Illinois, called the births “very unusual, but wonderful at the same time.”